Vacuum system.



W. SCOTT.

VACUUM SYSTEM.

APPLICATIN flLED SEPT. 1916.

Patente May 22, 1917.

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i i lUlE @ATE@ PATNT wl ltflEo WILLIAM SCOTT, OF MEDFORD, MASSACHUSETTS.

VAGUUM SYSTEM.

Application filed September 11, 1916.

To all whom it may camera: i

Be lt known that I, lVILLIAM Sco'r'r, a

`citizen of the United States, residing at t of thetype employed for maintaining a sub- Stantially uni't'ormhead on flowing liquid, and more particularly to vacuum. systems of this type for supplying gasolene to carbureters of internal conbustion engines.

Theobject of the invention is to improve the construction, organization, and mode of operation of vacuum systems of the above type, in order to produce a more simple, eflicient and durable vacuum system than has' heretofore been produced. This object is accomplished in the improved vacuum system described in the following specifica- 'tion and particularly pointed out in the appended claims.

The preferred form of the invention is illustrated in the accompanying drawings, in which Figure 1 is a central s ectional elevation of the intake and discharge chambers ot' the vacuum system, their connection with the intake manifold of an internal combustion engine being shown' diagrammatically, and Fg. 2- is a top plan of the vacuum Valve. 4

In the vacnum system illustrated in the drawings the explosion fluid or gasolene is drawn into' an intake chamber ,5 through an intake passage 6 from a source' of supply located below the level of the device; and Whenfa predetermined amount of gasolene has been drawn into the intake chamber, it is discharged into` a discharge chamber 7 from which it fiows by way of the outlet 8 to the carbureter of the internal combustion engine, in connection with which the vacuum system is employed in order to maintain a substantially nniform head on the gasolene as it flows to the carbureten The gasolene is drawn into the intake chamber by the Vacuum created therein by the intake manifold 9 of the engine. The intake manifold is connected with the intake cl'amber by means of a vacuu'm pipo "LG which screws into a threaded hole in the ipwardly extend Spec'fication of Letters Patent.

and the "means of a hollow rod 20 'which screws into Patented May 22, ieri. Serial No. 119475.

ing portion ll of a centrally -disposed boss 12 in the cap 13. The intake chamber is inclosed at its sides by a cylindrical glass tube 15, at its bottom by the upper side oi' a fianged partition plate 16, and at its top by the fianged cap 13. Tight joint's between the tube and the plate, and between the tube and the cap, are Secured by means of the Leather gaskets 17 and 18 respectively. The glass tube is held against the plate, cap is held against the tube by the plate and onto the upper end of which the cap l3screws. In the' boss 12 of the cap 13 is a vaeuum passage 21 which leads from the intake 'chamber to a narrow threat 22- which connects the vacuum pipe 10 with a valve chamber or guideway 23. It will be observed that' the upper end '24: of the throat 22 is 'contractedgthis 'contraction is for the purpose of retarding the Vacuumizing of the intake chamber to thereby prevent the ebulltionr of the gasolene as it' is d'rawn into the chamber; The intake passage 6 is formed in thdpartition plate 16, and is normally closed by a ball check valve 25' which is seated in a recess 26, and is held from displacement therefrom by a clip 27. Loeated within the intake chamber is a float 28 by which the operation of the apparatus is controlled. The fioat is provided .with a hollow axial stem 29 which loosely embraces the hollow rod 20, and the fioat is thereby guided in` its up and down 'movements When a predetermined amount of gasolene has been received into the chamber, a "vacuum valve 30 is raised up to and held against the lower face of the .downwardly ;extending portion 14: of the boss 12. In the'upper face cof the' valve is formed a groove 31 with which the vacuum passage 21 r'egisters, and the vacuum valve'30 is held up against the boss 12 by the sucton created in the vaeuum passage 21. and in the groove 31 by the engine manifold. The vacuum valve consists of a disk provided with lateral cars `32 having holes t`o receive two pins 33 rising from' the float and passing loosely through the holes n the ears; the Vacuum valge is also provided with 'a sleeve 34 which loosely embraces the rod 20, and .is free to move thereon. The sleeve 34: 'prevents the vacuum valve from cramping in its move- .mentori the rod 20. As the gasolene in the intake chamber is diseharged, the fioat dei scends until the heads of the pine 33 engage V discharge chanber the gasolene passes by the fioat g'adually settles until the heads of i the pins 33 engage the upper surface of the vacuum valve. Thereupon, as the fioat continues to settle, owing to the depletion of the gasolene in the intake chamber, the vacuum valve is suddenly disengaged from the boss 12, and the vacuum above the valve 55 being vented by the vacuum passage 21 .and the open air passage the valve falls thereby allowing the (lischarge valve 50 to fall upon its seat, which closes the discharge passage. As the valve 55 de` scends, its reduced portion 57 passes beyond the air passage 59, so that the air passage is efi'ectuall y closed. Thereupon the process of exhaustingthe intake chamber is recommenced and the gasolene flows in as before. If for any ason the valve stem 52 should remain in raised position after the unseating of the vacuum valve 30, the under surface of the fioat will,presently come into en gagement with the outwardly extending .ends of the pin 51, by which the discharge valve is secured to the valve sten 52, and the weight of the float will operate to tend do to move the valve stem.

It will be recognized from the description of the improved Vacuum system forming the subject-matterof the present invention, that in Construction it is simple, being 'ree ;from

- springs and such other parts as are liahle to become inoperative by reason of continued use, and, therefore, that it constitutes a highly ellicient and durable 'system which can be cheaply manufactured.

Having thus described the invention, what is claimed is:

1. A'Vacuum system for maintaining a ?substantially uniform head on fiowing fluids, having, in combination, an intake chamber, an inlet passage thereto, a discharge passage therefrom, means for vacumizing the chamber, a Vacuum passage leading into the chamber through which it is vacuumized, an air passage connected .with the at- 'mosphe'e and with the intake chambcr normally closed, means for closing the vacuum passage When a predetermined amount of fluid has been brought into the chamber, and means actuated by the vacuunizing means upon the closing of the vacuum passage for opening the air passage to permit the chamber to be under atmospheric pressure.

2. A' Vacuum system having, in combination, an intake chamber, an inlet passage through which fluid is drawn into the chamber, a discharge passage from the chamber normallyclosed, a vacum passage, means for vacuumizing the chamber through the vacuum passage, an air passage connected with the atmosphere and with the chamber normally closed, means controlled by the amount of fluid in the chamber' for closing the vacuum passage, and means controlled by the Vacuumizing means for opening the air passage and sinultaneously therewith the discharge passage.

3. A ,vacuum system for maintaining a substantially uniform head on flowing fluds having, in combination, an intake chamber provided with intake and discharge passageS, a vacuum passage leading into the chamber through which it may be vacuumized, means 'for vacuumizing the chamber, a normally closed au:` passage leading from the atmosphere into the chamber, a float, a

valve actuated by the fioat to close the vacuum passage When a predetermined anount of fluid has been drawn into the chamber, and a valve normally closing the air passage actuated by the Vacuumizing means upon the closing of the Vacuum passage to open the air passage.

4:. A vacuum system having, in combination, an intake chamber provided with an inlet passage through which fluid is drawn into -the chanber, a dscharge passage through which the fluid is discharged from the chamber, means for vacuumizing the chanber, a normally closed air passage connected with the atmosphere and with the chamber, means for closing the vacuum passage when a predetermined amount of fluid has been brought into the chamber, and means disconnected from the vacuum valve and acting independently thereof controlled by the vacuumizing means for opening the air passage when the* 'Vacuum passage is closed.

5. A vacuum system having, in combination, an itake chanh', a plate forning the bottom of said chamber, an inlet passage in said plate through which fluid is drawn into the chamber, a discharge passage in said phte through which the fluid is discharged 'from the chamber a ca formin the to of said chanber, a vacuun passage in said cap through which the chamber is vacuumized, an air passage in said ca p connected with the atmosphere and with the intake chamber, a guideway erossing the air passage, a valve for normally closing the air passage adapted to slide in the guideway and 'having a reduced portion, vacuum'zing means connected with the vacuum passage and with the guideway for vacuumizing the chamber, a hollow rod conneeting the cap with the plate, a diseharge valve adapted to slide in said rod for normally closing the `discharge passage, a valve stem counecting the discharge valve with the first named valve, a fioat adapted to be guded by the hollow rod for control ling the amount of fluid to be received into the chamber, and a Vacuum valve loosely connected with the float for closing the vac- .the exhust passage.

uum passage When e predetermined amount ot hud has been drawn into the chembe',

seid air pass' go vnlve being edepted to he aetuated oy the vaeuumzng ment s to bring has passed 'into the inteke ohzunber, n (lischerge ehauhcg e clsehnrge passage connect-hi s; 'the two chznnhers; and e Valve 'for normally olosing the dseherge passage, adzptcd to be :etuzted hy the inteke chamber exl'zusting means 'upon the olosing of 7. A. veteuum system ,for substeutielly uniform head on tlowing fiuols, conprisi` en int l e chanher tor reoeiving fluid a` loet in the inteke ohenber, e discherge chenber, ;a passage between the two ohanhers, e velve tor nornmlly closing the passage, means *tor creating' e vecuum in the inteke chamber to cause it to receive fluid, and means opemted by the vecuum Greeting means toy Olrellifig the valve in the passage to pernit the fluid to flow from the intake chanber into the dselarge ohamber when the fioat hes risen to e predetermined height.

8. A mcuum minteinng e system for maintening e meme? hes been drwn into the intake chainher, dscharge chzmber, e discherge passage between the tWo ehanbers normally closed, and

means actieted by the Vacuum creating means for openng the discherge passage substentelly simulteneously With the *closing of the vecuum passage.

9. A Vacuun system .for` neinteinug e substentially uniform head on tlowing fiuds eomprising en intel e chunher, means tor drmv'g the fluid into the ntake chainher, e floet in the iuteke eheinher to stop the flow of fluid into the ehember When a pre deternined amount of fluid has been dreWn into 'the chember, e clischerge ohember, :t

passage between the two chenhers normally closed, and means controlled by the means for drawing the fluid into the nt ke ehember tor opening the passage. i

10. A. vacuun system for ineinteininge subsmntially uniform head onfiowng fluids,

conprising on intal e ohamber, means' tor I drawing; the fluid into the intake'oheinher, e dscharge ehember, e pesege between the two chembers normally closed end means controlled by the means for dmwing the fluid into the intal e ohomher ;tor opening the passage. i v

WILMAM seem., 

